来自孙纪敏的问题
Doyouknowtheboy()isplayingsoccerthere?Certain.heisafriendofmy()Awho,brothersBwho,brotherCwhom,brothersDwhose,brother
Doyouknowtheboy()isplayingsoccerthere?Certain.heisafriendofmy()
Awho,brothersBwho,brotherCwhom,brothersDwhose,brother

